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PDF Merger

Merge multiple PDF files into one in any order.

Files never leave your device · Processed in your browser

Add files to see a live preview of the merge order here.

    What is this?

    Arrange multiple PDF files in any order and merge them into a single PDF. Pages are copied as-is, so original quality and text stay intact.

    Document handling uses pdf-lib (MIT license); preview rendering uses pdf.js (Apache-2.0, Mozilla) — both run as local bundles / lazy-loaded modules entirely in your browser.

    How to use it

    Pick or drop PDF files to add them to the list. Use the up/down buttons to reorder and the close button to remove files you don't need. Once the order looks right, click Merge → to download the result.

    Privacy & safety

    Loading, merging, previewing and downloading all happen entirely in your browser — files are never uploaded or stored on a server.

    FAQ

    How does PDF merging work here?
    Each PDF is loaded and its pages are copied as-is, then combined into one document in the order you set. Document handling uses pdf-lib (MIT); preview rendering uses pdf.js (Apache-2.0, Mozilla) — both run as local bundles / lazy-loaded modules with no external server calls.
    Can I change the file order?
    Yes — use the up/down buttons next to each file to reorder them; the preview strip on the left updates immediately.
    Can I merge password-protected PDFs?
    No. Password-protected PDFs are flagged as errors in the list and automatically excluded from the merge. Please remove the password first and try again.
    Is my PDF uploaded to a server?
    No. Loading, merging, previewing and downloading all happen in your browser only — nothing is sent or stored on a server.

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